package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import com.mmall.util.RedisPoolUtil;
import com.mmall.util.RedisShardedPoolUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
//import sun.util.resources.cldr.vai.CalendarData_vai_Latn_LR;

import java.util.UUID;

@Service("iUserService")
public class UserServiceImpl implements IUserService {
    //通过spring scan扫描包
    @Autowired
    private UserMapper userMapper;

    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUserName(username);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }
        System.out.println("用户名存在，判断密码");
        //todo 密码登陆
        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user = userMapper.selectLogin(username, md5Password);
        if (user == null) {
            return ServerResponse.createByErrorMessage("密码错误");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登陆成功", user);
    }

    public static void main(String[] args) {
        System.out.println(MD5Util.MD5EncodeUtf8("hanjinsong"));
    }

    public ServerResponse<String> register(User user) {
        ServerResponse validResponse = this.checkValid(user.getUsername(), Const.USERNAME);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        validResponse = this.checkValid(user.getEmail(), Const.EMAIL);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        user.setRole(Const.Role.Role_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
        //把密码写入数据库
        int resultCount = userMapper.insert(user);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    public ServerResponse<String> checkValid(String str, String type) {
        if (StringUtils.isNotBlank(type)) {
            //开始校验
            if (Const.USERNAME.equals(type)) {
                int resultConst = userMapper.checkUserName(str);
                if (resultConst > 0) {
                    return ServerResponse.createByErrorMessage("用户名已经存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultConst = userMapper.checkEmail(str);
                if (resultConst > 0) {
                    return ServerResponse.createByErrorMessage("email已经存在");
                }
            }
        } else {
            return ServerResponse.createByErrorMessage("参数错误!");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    public ServerResponse selectQueation(String username) {
        ServerResponse<String> validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (StringUtils.isNotBlank(question)) {
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    public ServerResponse<String> checkAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            //说明问题及其问题的答案是这个用户的，并且是正确的
            String forgetToken = UUID.randomUUID().toString();
            //TokenCache.setKey(TokenCache.TOKEN_PREFIX + username, forgetToken);
            RedisShardedPoolUtil.setex(Const.TOKEN_PREFIX+username,forgetToken,60*60*12);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误！！！");
    }

    public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken) {
        if (StringUtils.isBlank(forgetToken)) {
            return ServerResponse.createByErrorMessage("参数错误，token需要传值");
        }
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
//        String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
        String token = RedisShardedPoolUtil.get(Const.TOKEN_PREFIX + username);
        if (StringUtils.isBlank(token)) {
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }
        if (StringUtils.equals(forgetToken, token)) {
            String md5password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, md5password);
            if (rowCount > 0) {
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        } else {
            return ServerResponse.createByErrorMessage("token错误，请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }

    public ServerResponse<String> reserPassword(String passwordOld, String passwordNew, User user) {
        //防止横向越权，要检验一下这个用户的旧密码，一定要指定是这个用户，因为我们会查询一个count(1),如果不指定id,那么结果就是true
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("旧密码错误");
        }
        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if (updateCount > 0) {
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }

    public ServerResponse<User> updateInfomation(User user){
        //username不能北更新
        //email也要进行校验，检验新的email是否存在，并且存在的Email如果相同，不能是当前用户
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(),user.getId());
        if(resultCount > 0){
            return ServerResponse.createByErrorMessage("email已经存在,请更换Email尝试更新");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());
        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if(updateCount > 0){
            return ServerResponse.createBySuccess("更新个人信息成功",updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }

    public ServerResponse<User> getinfomation(Integer userId){
        User user = userMapper.selectByPrimaryKey(userId);
        if(user == null){
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);
    }


    //backend:校验是否是管理员
    public ServerResponse checkAdminRole(User user){
        if(user != null && user.getRole().intValue() == Const.Role.Role_ADMIN){
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }
}
